CN105443187A - Variable valve lift apparatus - Google Patents
Variable valve lift apparatus Download PDFInfo
- Publication number
- CN105443187A CN105443187A CN201510118313.1A CN201510118313A CN105443187A CN 105443187 A CN105443187 A CN 105443187A CN 201510118313 A CN201510118313 A CN 201510118313A CN 105443187 A CN105443187 A CN 105443187A
- Authority
- CN
- China
- Prior art keywords
- roller
- bar body
- hydraulic pressure
- cam
- air valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L2013/10—Auxiliary actuators for variable valve timing
- F01L2013/105—Hydraulic motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
A variable valve lift apparatus includes a lever body having a set length for a lever motion. One end of the lever body is connected with a hydraulic pressure supply portion and another end thereof is connected with the valve. A rotation shaft is disposed such that a width direction of the lever body is a length direction of the rotation shaft. A roller rotates around the rotation shaft. A high cam is disposed at the camshaft to rotate together with the camshaft and has a lobe shape for rolling-contact the roller to realize a high lift. A low cam is disposed at the camshaft to rotate together with the camshaft and has a lobe shape for rolling-contacting the roller to realize a low lift. The roller is disposed to slide along the length direction of the rotation shaft and selectively rolling-contact with the high cam or the low cam by sliding.
Description
The cross reference of related application
The application based on and require the rights and interests of the korean patent application No.10-2014-0119222 that on September 5th, 2014 submits in Korean Intellectual Property Office, the disclosure of this application is with incorporated herein by reference.
Technical field
The application relates to a kind of variable air valve lift apparatus.More specifically, the application relates to so a kind of variable air valve lift apparatus, and it can change valve lift by being optionally connected with high cam or low cam.
Background technique
The fuel that internal-combustion engine receives in a combustion chamber by burning and air generate power.In this article, operate intake valve by the driving of camshaft, when intake valve is opened, in air flowing in combustion chamber.In addition, exhaust valve is operated by drive cam shaft, and when exhaust valve is opened, air is discharged by from firing chamber.
The optimum operation of intake valve and exhaust valve is determined according to the rotating speed of motor.That is, the lift of valve or opening/closing timing are properly controlled according to the rotating speed of motor.In order to the rotating speed according to motor realizes best air door operation, have developed valve according to the rotating speed of motor with the lift range variable of different lift operation (VVL) device.Such as, there is a kind of variable air valve lift apparatus, wherein, for being set to camshaft at multiple cams of each different lift operation valve, and selecting the cam of operated valve according to condition.
But, when multiple cam is set to camshaft, can becomes complicated for optionally changing cam with the structure operating intake valve or exhaust valve, and can disturb between the element of this structure.If respectively and operate multiple cam independently for preventing the interference between the element of this structure, then each cam needs extra element to operate this cam, thus can increase cost.
The above-mentioned information being disclosed in background technique part of the present invention is only intended to deepen the understanding to general background technology of the present invention, and therefore its information comprised is not formed is the prior art known in those skilled in the art of this country.
Summary of the invention
The disclosure is devoted to provide a kind of variable air valve lift apparatus, and it is simple and prevent the advantage of the interference between element that it has structure.
According to a variable air valve lift apparatus for the exemplary of design of the present invention, it can come optionally the lift performing the air inlet of motor or the valve of exhaust to be changed over high lift or low lift according to the rotation of camshaft.Described variable air valve lift apparatus can comprise bar body, and it has the preseting length carrying out lever motion according to the rotation of described camshaft, and one end of described bar body is connected with hydraulic pressure supply department, and its other end is connected with described valve.Running shaft is arranged so that the width direction of described bar body is the length direction of described running shaft.Roller is set to rotate around described running shaft.High cam is arranged on described camshaft and sentences and to rotate together with described camshaft and to be set to have lobe shape, for contacting to realize high lift with described roller rolled.Low cam is arranged on described camshaft and sentences and to rotate together with described camshaft and to be set to have lobe shape, for contacting to realize low lift with described roller rolled.
Described roller can be set to along the described length direction of described running shaft slide and by sliding optionally with described high cam or described low cam Structure deformation.
Housing can be formed at described roller place, and described housing has cup-like shape thus makes to open inside it and outside is closed.Axle body can be formed at described running shaft place, described axle body is arranged on described enclosure interior and it is thicker than the two ends on the length direction of described running shaft, and the two ends on the length direction of described running shaft can be set to the outside closed being each passed through described housing.
Described lift range variable dress can comprise resilient member further, and it is supported by described bar body with the outer surface promoting described roller to the inside.Hydraulic chamber can be formed between the internal surface in the described closed outside of described housing and the outer surface of described axle body.
Described roller slides by the hydraulic pressure being supplied to described hydraulic chamber from described hydraulic pressure supply department.When being supplied to the release of described hydraulic pressure of described hydraulic chamber from described hydraulic pressure supply department, described roller slides to the inside by described resilient member.
Described bar body can form attachment hole, and described attachment hole receives the attachment hole from the described hydraulic pressure of described hydraulic pressure supply department.The oil duct of bar body is communicated with described attachment hole and extends towards described running shaft.Described running shaft can form the oil duct of axle and supply pressure passageway, and the oil duct of described axle is communicated with the oil duct of the described bar body in described interior of rotating shaft, and described voltage supply channel setting is with the oil way cross of described axle and is communicated with described hydraulic chamber.
The hydraulic pressure generated from described hydraulic pressure supply department can pass through described attachment hole, the oil duct of described bar body, the oil duct of described axle and described confession pressure passageway successively, thus is provided to described hydraulic chamber.
The oil duct of described axle can be formed as passing described axle body along the described length direction of described running shaft.The described pressure passageway that supplies can be formed as tilting relative to the described length direction of described running shaft thus extending to the described outer surface of described axle body and be communicated with described hydraulic chamber.
Stop member can be formed as protruding from the periphery of described axle body, and it is used as block piece to make the slip of roller described in described roller slip limit to the inside passing through release hydraulic pressure supply.
Described roller can slide laterally with described high cam Structure deformation and can slide to the inside with described low cam Structure deformation.
Described roller can have two rollers and described two rollers slide laterally simultaneously or slide to the inside.
Described high cam can have two high cams of the both sides being arranged on described low cam, and described two rollers can slide laterally with respectively be separately positioned on described low cam both sides high cam Structure deformation and slide to the inside with described low cam Structure deformation.
A kind of variable air valve lift apparatus of the exemplary according to design of the present invention can comprise bar body, it has the preseting length carrying out lever motion according to the rotation of camshaft, and has setting width and set thickness thus form the inner space passing vertically through described bar body.One end that hydraulic pressure supply department is arranged on described bar body is with to described bar body sap pressure supply.Running shaft is set to the described inner space of crossing described bar body.Roller to be arranged in the described inner space of described bar body and to rotate and length direction along described running shaft slides around described running shaft.The intermediate portion of axle body on the described length direction of described running shaft is thicker than the two ends on the described length direction of described running shaft, thus contacts with the inner circumferential of described roller, for the described roller of guided slidable.Between the outer surface that hydraulic chamber is formed in described axle body and the outer surface of described roller.Resilient member is arranged on described bar body around between the internal surface and the described outer surface of described roller of described inner space.High cam optionally roller described in Structure deformation and rotate the lever motion carrying out described bar body together with described camshaft, and there is the lobe shape of the high lift for realizing the valve be connected with one end of described bar body.Low cam optionally roller described in Structure deformation and rotate the lever motion carrying out described bar body together with described camshaft, and there is the lobe shape of the low lift for realizing the described valve be connected with one end of described bar body.
Described roller can slide with cam high described in Structure deformation according to hydraulic pressure is supplied to described hydraulic chamber from described hydraulic pressure supply department laterally, and described roller can be slided with cam low described in Structure deformation by described resilient member to the inside according to by the release of the hydraulic pressure of described hydraulic chamber.
Variable air valve lift apparatus can comprise further: attachment hole, and its described one end being formed in described bar body is to receive the described hydraulic pressure from described hydraulic pressure supply department; The oil duct of bar body, it is formed in described bar body to be communicated with described attachment hole and to extend towards described running shaft.The oil duct of axle is formed in described running shaft to be communicated with the oil duct of described bar body.For pressure passageway, be formed in described axle body and sentence with the oil way cross of described axle and be communicated with described hydraulic chamber.
The hydraulic pressure generated from described hydraulic pressure supply department can pass through described attachment hole, the oil duct of described bar body, the oil duct of described axle and described confession pressure passageway successively, thus is supplied to described hydraulic chamber.
Can form at place of described hydraulic pressure supply department the hydraulic pressure supply orifice be communicated with described attachment hole thus the described hydraulic pressure generated from described hydraulic pressure supply department is supplied to described bar body.When the base portion of cam high described in described roller contact or described low cam, described attachment hole can be communicated with described hydraulic pressure supply orifice, and when making described roller contact with described high cam or described low cam lobe, being communicated with between described attachment hole with described hydraulic pressure supply orifice can be closed.
The described pressure passageway that supplies can be formed as tilting relative to the length direction of described running shaft.
The base of described high cam can be consistent with the base of described low cam.
Stop member can be formed as the slip at described roller slip limit to the inside roller, and described stop member protrudes from the periphery of described axle body.
Described roller can have two rollers, and described two rollers slide laterally simultaneously or slide to the inside.
Described high cam can have two high cams of the both sides being arranged on described low cam, thus described two rollers are slided laterally with two high cams described in difference Structure deformation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of variable air valve lift apparatus of the exemplary according to the present invention's design.
Fig. 2 is the top plan view of variable air valve lift apparatus of the exemplary according to the present invention's design.
Fig. 3 shows the sectional view realizing the state of the low lift of valve according to the variable air valve lift apparatus of the exemplary of the present invention's design.
Fig. 4 shows the application drawing achieving the variable air valve lift apparatus of the low lift of valve of the exemplary according to the present invention's design.
Fig. 5 shows the sectional view realizing the state of the high lift of valve according to the variable air valve lift apparatus of the exemplary of the present invention's design.
Fig. 6 shows the application drawing achieving the variable air valve lift apparatus of the high lift of valve of the exemplary according to the present invention's design.
Fig. 7 is the application drawing of variable air valve lift apparatus of the exemplary according to the present invention's design.
Embodiment
Below with reference to accompanying drawings the exemplary of the present invention's design is described in detail.
Fig. 1 is the schematic diagram of variable air valve lift apparatus of the exemplary according to the present invention's design.
As shown in Figure 1, bar body 10, roller 20, running shaft 30 and hydraulic pressure supply department 40 is comprised according to the variable air valve lift apparatus of the exemplary of the present invention's design.
Bar body 10 is by receiving the moment of torsion of camshaft 80 to carry out lever motion and to run with opening/closing valve 60.In addition, cam 70 is formed or is arranged on camshaft 80 the rotary motion of camshaft 80 to be converted to the lever motion of bar body 10.In this article, valve 60 is intake valve for motor or exhaust valve.
Cam 70 is formed as the shape with general cam, and wherein, the periphery of the cross section of cam 70 is formed as having ellipse, and one end is protruded than the other end.Generally speaking, one end of cam 70 is called salient angle, and the other end of cam 70 is called base portion.
The base portion of cam 70 is basic circles of cam 70, and this basic circle has the circular arc of fixation radius in the periphery of cam 70.In this article, the circular arc of base portion is using the circular arc of the rotating center C of cam 70 as the center of circle C of circular arc.In addition, cam lobe refer to the periphery of cam 70 open from valve 60 close to valve 60 at first terminate in be promoted the part of roller 20 by the rotation of cam 70.
Bar body 10 has seated connection groove 12 and attachment hole 14.Seated connection groove 12 is formed as hydraulic pressure supply department 40 seated connection groove thereon.In addition, hydraulic pressure supply department 40 is mounted to one end of bar body 10, is in the state of seated connection on seated connection groove 12.In addition, the other end of bar body 10 is connected with valve 30 thus by the lever motion of bar body 10, valve 60 is opened or closed.
The space passed along the Vertical direction of bar body 10 is formed in the inside of bar body 10.That is, bar body 10 has the preseting length carrying out lever motion, and has setting width and set thickness to form the inner space of bar body 10.The rotating center being formed in the lever motion at one end place of described bar body 10 is connected with hydraulic pressure supply department 40.
In explanation hereafter, be set to the outer surface of bar body 10 and internal surface or outside element and internal constituent elements and refer to the part being in outside and inner same side relative to the width direction of bar body 10.
Attachment hole 14 is the holes of the inside being connected to bar body 10 from seated connection groove 12.
Roller 20 to be arranged in the inner space of bar body 10 and to be rotatably connected with bar body 10.In addition, roller 20 and cam 70 Structure deformation are to be converted to the lever motion of bar body 10 by the rotary motion of camshaft 80.
Running shaft 30 is the axles being formed as cylindrical shape, and this axle is the rotating center of roller 20.In addition, running shaft 30 is set to pass bar body 10 along the width direction of bar body 10, and bar body 10 is rotatably connected by running shaft 30 each other with roller 20.That is, running shaft 30 is set to the inner space of crossing bar body 10.
Roller 20 is formed as the cylindrical shape of hollow, and vacancy is provided with side power transmission member 25 in roller 20.In addition, side power transmission member 25 vacancy in roller 20 to be inserted between roller 20 and running shaft 30 thus roller 20 is smoothly rotated.
Hydraulic pressure is supplied to the inside of bar body 10 through attachment hole 14 by hydraulic pressure supply department 40.In addition, hydraulic pressure supply department 40 can be sap pressure supply to operate the conventional hydraulic lash adjuster (HLA) of variable air valve lift apparatus.In this article, hydraulic lash adjuster is that sap pressure supply is to operate variable air valve lift apparatus and to make the device of valve tappet and the cam mode movement of close contact all the time, because this device is known to those skilled in the art, therefore description is omitted.
Hydraulic pressure supply department 40 is formed with hydraulic pressure supply orifice 42.
Hydraulic pressure supply orifice 42 is formed in the hole at the part place that hydraulic pressure supply department 40 contacts with seated connection groove 12, thus the hydraulic pressure generated from hydraulic pressure supply department 40 is supplied to bar body 10.In addition, because hydraulic pressure supply orifice 42 is communicated with attachment hole 14 (described attachment hole 14 is communicated with seated connection groove 12), the hydraulic pressure thus generated from hydraulic pressure supply department 40 is supplied to bar body 10 by attachment hole 14.
Fig. 2 is the top plan view of variable air valve lift apparatus of the exemplary according to the present invention's design, and Fig. 3 shows the sectional view realizing the state of the low lift of valve according to the variable air valve lift apparatus of the exemplary of the present invention's design.
As shown in Figures 2 and 3, housing 24, through hole 26, axle body 32, stop member 34, the oil duct 36 of axle, the oil duct 15 of bar body and resilient member 50 is comprised further according to the variable air valve lift apparatus of the exemplary of the present invention's design.
Housing 24 can be used as the inner ring of rolling bearing, and this rolling bearing is made up of roller 20, side power transmission member 25 and the housing between side power transmission member 25 and running shaft 30 24.In this article, the function of the inner ring of rolling bearing is well known by persons skilled in the art, so will omit detailed description thereof.
Housing 24 is formed as the cup-like shape of U-shaped profile shape.Now, roller 20 is made up of two rollers 21 and 22, these two rollers 21 and 22 be arranged to internal surface towards each other, and in order to better understand and facilitate explanation, these two rollers 21 and 22 to be called " the first roller 21 " and " the second roller 22 ".In addition, housing 24 protrudes, to form cup-like shape from the outer surface of the first roller 21 and the second roller 22 respectively.That is, the opening side of the U-shaped cross-section of housing 24 is set to the internal surface towards the first roller 21 and the second roller 22 respectively, its closed side be set to respectively towards the first roller 21 and the second roller 22 outer surface or protrude respectively to pass through outer surface.
Through hole 26 is formed in the closed side of housing 24.In addition, running shaft 30 inserts in through hole 26 so that through housing 24.
The central part that axle body 32 is formed as on the length direction of running shaft 30 is thicker than the two ends on the length direction of running shaft 30.That is, axle body 32 is formed as with running shaft 30 in step-like.
Axle body 32 is arranged on the inner side of the cup-like shape of housing 24.In addition, the size of the periphery of axle body 32 is corresponding with the inner circumferential of housing 24, and guarantees tightness between the periphery of axle body 32 and the inner circumferential of housing 24.In addition, housing 24 is guided by axle body 32 and is set to slide along the length direction of running shaft 30 together with roller 20.
The central part that stop member 34 is formed in the length direction of axle body 32 by protruding from the periphery of axle body 32.In addition, stop member 34 is arranged between the first roller 21 and the second roller 22.In addition, stop member 34 limits the first roller 21 and the second roller 22 towards the excessively movement of interior side direction in the moving of the first roller 21 slided along the length direction of running shaft 30 and the second roller 22, and prevents the first roller 21 from impacting each other with the internal surface of the second roller 22 or contacting.
The oil duct 36 of axle is the oil duct being formed as passing along the length direction of running shaft 30 (traverse) axle body 32.
The oil duct 15 of bar body is the oil duct forming or be arranged on bar body 10 place, and is set to be communicated with the oil duct 36 of axle with attachment hole 14.
Resilient member 50 is arranged between the internal surface of the inner space of bar body 10 and the outer surface of roller 20.In addition, resilient member 50 is for inwardly promoting roller 20.
When being provided with first roller 21 and second roller 22, resilient member 50 be separately positioned on the first roller 21 outer surface and in the inner space of bar body 10 towards between the internal surface of the outer surface of the first roller 21, and be arranged on the second roller 22 outer surface and in the inner space of bar body 10 towards between the internal surface of the outer surface of the second roller 22.In order to better understand and facilitate explanation, the resilient member 50 being used for promoting the first roller 21 is called " the first resilient member 51 ", and the resilient member 50 being used for promoting the second roller 22 is called " the second resilient member 52 ".In addition, the outside of resilient member 50 is supported to the internal surface of the inner space of bar body 10, is then supported to the outer surface of roller 20 inside it.In addition, resilient member 50 can be helical spring, and the bump of housing 24 can insert helical spring inside thus make helical spring inner seated connection and around the bump of housing 24.
Fig. 4 shows the application drawing achieving the variable air valve lift apparatus of the low lift of valve of the exemplary according to the present invention's design.
As shown in Figure 4, the variable air valve lift apparatus according to the exemplary of the present invention's design comprises high cam 71 and 72, low cam 74, hydraulic chamber 39 further, and for pressure passageway 38.That is, cam 70 is made up of high cam 71 and 72 and low cam 74.
High cam 71 and 72 is the cam of the high lift rotated to realize valve 60, and is formed or be set to protrude from the periphery of camshaft 80.
Low cam 74 is the cam of the low lift rotated to realize valve 60, and is formed or be set to protrude from the periphery of camshaft 80.
High cam 71 and 72 is formed as its salient angle is protruded more than the salient angle of low cam 74.In addition, high cam 71 and 72 and low cam 74 are formed as its base portion is equal to each other.Fig. 4 and Fig. 6 shows the both sides that two high cams 71 and 72 are separately positioned on low cam 74, but is not limited thereto, and the position of high cam 71 and 72 and low cam 74 can according to the design of those skilled in the art conversely.
When two high cams 71 and 72 are separately positioned on the both sides of low cam 74, in order to better understand and facilitate explanation, the high cam 71 and 72 contacted with the first roller 21 according to the variable air valve lift apparatus of the exemplary of the present invention's design by operation is called " the first high cam 71 ", and the high cam 71 and 72 contacted with the second roller 22 by this operation is called " the second high cam 72 ".
Hydraulic chamber 39 is formed in the space between the outer surface of axle body 32 and the closed side internal surface of housing 24, and this outer surface and this closed side internal surface are formed by the stepped part of axle body 32 and running shaft 30.
To be formed in axle body 32 for pressure passageway 38 and to be set to tilt to intersect with the oil duct 36 of axle relative to the length direction of running shaft 30.In addition, the outer surface of axle body 32 is extended to be communicated with hydraulic chamber 39 for pressure passageway 38.
As shown in Figures 2 to 4, the situation of not supplying from hydraulic pressure supply department 40 to bar body 10 hydraulic pressure is described.
First roller 21 and the second roller 22 are inwardly promoted by the first resilient member 51 and the second resilient member 52 respectively.Under the state that the first roller 21 and the internal surface of the second roller 22 or the internal surface of housing 24 contact with stop member 34, the first roller 21 and the second roller 22 and low cam 74 Structure deformation.In this condition, the low lift of valve 60 is realized according to the rotation of camshaft 80 and cam 70.Fig. 4 by a dotted line arrow shows the movement direction of the roller 20 by resilient member 50 movement.
Fig. 5 shows the sectional view realizing the state of the high lift of valve according to the variable air valve lift apparatus of the exemplary of the present invention's design, and Fig. 6 shows the application drawing achieving the variable air valve lift apparatus of the exemplary of the high lift of valve according to the present invention's design.
As shown in Figure 5 to Figure 6, the situation of supplying from hydraulic pressure supply department 40 to bar body 10 hydraulic pressure is described.
The hydraulic pressure generated from hydraulic pressure supply department 40 is supplied to hydraulic chamber 39 via the oil duct 15 of hydraulic pressure supply orifice 42, attachment hole 14, bar body, the oil duct 36 of axle and confession pressure passageway 38 successively.Fig. 5 by a dotted line arrow shows the route of sap pressure supply.
When the hydraulic pressure that the power promoting roller 20 than resilient member 50 is larger is supplied to hydraulic chamber 39, the first roller 21 and the second roller 22 slide laterally.Therefore, the first roller 21 and the first high cam 71 Structure deformation, and the second roller 22 and the second high cam 72 Structure deformation.In this condition, the high lift of valve 60 is realized according to the rotation of camshaft 80 and cam 70.Fig. 6 by a dotted line arrow shows the movement direction of the roller 20 by the hydraulic pressure and movement being supplied to hydraulic chamber 39.
If the hydraulic pressure supply coming self-hydraulic supply department 40 is released, then the first roller 21 and the second roller 22 return (referring to figs. 2 to Fig. 4) respectively by the first resilient member 51 and the second resilient member 52.Now, stop member 34 with being restricted the first roller 21 and the second roller 22 stopper protrusion towards the motion of interior side direction movement, to prevent from inwards to move produced impact in direction by the first roller 21 and the second roller 22.
First roller 21 and the second roller 22 be carry out in roller 20 with the part of the base in contact of cam 70 according to the sliding movement of hydraulic pressure supply department 40 sap pressure supply and release hydraulic pressure.Therefore, the sliding movement of the first roller 21 and the second roller 22 is smoothly carried out, and prevents the interference and impact that may occur in the sliding movement process of the first roller 21 and the second roller 22.Those skilled in the art easily can realize the control to this operation by the sensor of the rotatable phase using detection camshaft 80 and crankshaft (not shown).
Fig. 7 shows the application drawing of the variable air valve lift apparatus of the exemplary according to the present invention's design.
As shown in Figure 7, the hydraulic pressure supply orifice 42 of hydraulic pressure supply department 40 is different from each other in the region that roller 20 contacts with the salient angle of cam 70 with the position of the attachment hole 14 of bar body 10.Therefore, hydraulic pressure supply orifice 42 was closed with being communicated with of attachment hole 14, and hydraulic pressure is not supplied to bar body 10 by hydraulic pressure supply department 40.Now, the hydraulic pressure be supplied in bar body 10 is maintained naturally.
The variable air valve lift apparatus fault caused by the pressure of change pressure control valve (OCV, not shown) is prevented by this operation.In addition, supply and the release of carrying out hydraulic pressure in the part that contacts with the salient angle of cam 70 at roller 20 is prevented in advance.
According to the exemplary of the present invention's design, because roller 20 moves to be contacted with low cam 74 by resilient member 50 when release hydraulic pressure, thus to break down or under the condition such as motor shutdown at such as pressure control valve, with low lift actuation valve 60.
According to the exemplary of the present invention's design, optionally contact with 72 or low cam 74 with high cam 71 due to roller 20 and only have roller 20 to contact with 72 or low cam 74 with high cam 71, the deterioration in fuel consumption that the interference between thus can preventing by element and friction cause.In addition, because the structure by using hydraulic pressure to make roller 20 optionally contact with 72 or low cam 74 with high cam 71 is comparatively simple, so reactivity can be improved, and cost can be reduced.In addition, owing to achieving suitable valve lift, so finally can fuel consumption be improved according to the rotating speed of motor and load.
Although the present invention is described with reference to concrete exemplary, but should the present invention be understood and be limited to disclosed embodiment, on the contrary, the present invention is intended to contain and is included in various amendment in the spirit and scope of the present invention that the claim of enclosing limits and equivalently arranges.
Claims (20)
1. a variable air valve lift apparatus, optionally changes into high lift or low lift by the lift of valve for coming according to the rotation of camshaft, thus performs air inlet or the exhaust of motor, and described variable air valve lift apparatus comprises:
Bar body, it has the preseting length carrying out lever motion according to the rotation of described camshaft, and the one end being adapted to described bar body is connected with hydraulic pressure supply department and its other end is connected with described valve;
Running shaft, it is arranged so that the width direction of described bar body is the length direction of described running shaft;
Roller, it is set to rotate around described running shaft;
High cam, it is arranged on described camshaft and sentences and to rotate together with described camshaft and to be set to have lobe shape, and described high cam contacts to realize high lift with described roller rolled; And
Low cam, it is arranged on described camshaft and sentences and to rotate together with described camshaft and to be set to have lobe shape, and described low cam contacts to realize low lift with described roller rolled,
Wherein said roller be set to along the described length direction of described running shaft slide and by sliding optionally with described high cam or described low cam Structure deformation.
2. variable air valve lift apparatus according to claim 1, wherein form housing at described roller place, described housing there is cup-like shape thus make to open inside it and outside close, axle body is formed at described running shaft place, described axle body is arranged on described enclosure interior and is adapted to thicker than the two ends of the length direction of described running shaft, and the two ends of the length direction of described running shaft are set to the outside closed being each passed through described housing.
3. variable air valve lift apparatus according to claim 2, it comprises further:
Resilient member, it is supported by described bar body with the outer surface promoting described roller to the inside,
Wherein, between the internal surface and the outer surface of described axle body in the described closed outside of described housing, hydraulic chamber is formed.
4. variable air valve lift apparatus according to claim 3, wherein said roller is slided by the hydraulic pressure being supplied to described hydraulic chamber from described hydraulic pressure supply department, and when being supplied to the release of the hydraulic pressure of described hydraulic chamber from described hydraulic pressure supply department, described roller is slided to the inside by described resilient member.
5. variable air valve lift apparatus according to claim 4, wherein said bar body forms the oil duct of attachment hole and bar body, described attachment hole receives the described hydraulic pressure from described hydraulic pressure supply department, and the oil duct of described bar body is communicated with described attachment hole and extend towards described running shaft, and described running shaft forms the oil duct of axle and supplies pressure passageway, the oil duct of described axle is communicated with the oil duct of the described bar body in described interior of rotating shaft, and described voltage supply channel setting is with the oil way cross of described axle and is communicated with described hydraulic chamber.
6. variable air valve lift apparatus according to claim 5, the hydraulic pressure wherein generated from described hydraulic pressure supply department passes through described attachment hole, the oil duct of described bar body, the oil duct of described axle and described confession pressure passageway successively, thus is provided to described hydraulic chamber.
7. variable air valve lift apparatus according to claim 5, the oil duct of wherein said axle is formed as passing described axle body along the described length direction of described running shaft, and the described pressure passageway that supplies is formed as tilting relative to the described length direction of described running shaft thus extending to the described outer surface of described axle body and be communicated with described hydraulic chamber.
8. variable air valve lift apparatus according to claim 4, wherein stop member is formed as protruding from the periphery of described axle body, and it is used as block piece to make the slip of roller described in described roller slip limit to the inside passing through release hydraulic pressure supply.
9. variable air valve lift apparatus according to claim 4, wherein said roller slide laterally with described high cam Structure deformation and slide to the inside with described low cam Structure deformation.
10. variable air valve lift apparatus according to claim 4, wherein, described roller has two rollers and described two rollers slide laterally simultaneously or slide to the inside.
11. variable air valve lift apparatus according to claim 10, wherein said high cam has two high cams of the both sides being arranged on described low cam, and described two rollers slide laterally with respectively be separately positioned on described low cam both sides high cam Structure deformation and slide to the inside with described low cam Structure deformation.
12. 1 kinds of variable air valve lift apparatus, it comprises:
Bar body, it has the preseting length carrying out lever motion according to the rotation of camshaft, and has setting width and set thickness thus form the inner space passing vertically through described bar body;
Hydraulic pressure supply department, its one end being arranged on described bar body is with to described bar body sap pressure supply;
Running shaft, it is set to the described inner space of crossing described bar body;
Roller, it is arranged in the described inner space of described bar body, and the length direction of described roller around described running shaft rotation and along described running shaft slides;
Axle body, its intermediate portion on the described length direction of described running shaft is thicker than the two ends on the described length direction of described running shaft, thus contacts with the inner circumferential of described roller, for the described roller of guided slidable;
Hydraulic chamber, between its outer surface being formed in described axle body and the outer surface of described roller;
Resilient member, it is arranged on described bar body around between the internal surface and the described outer surface of described roller of described inner space;
High cam, it is roller described in Structure deformation and rotate the lever motion carrying out described bar body together with described camshaft optionally, and has the lobe shape of the high lift for realizing the valve be connected with one end of described bar body; And
Low cam, it is roller described in Structure deformation and rotate the lever motion carrying out described bar body together with described camshaft optionally, and has the lobe shape of the low lift for realizing the described valve be connected with one end of described bar body,
Wherein, described roller slides with cam high described in Structure deformation according to hydraulic pressure is supplied to described hydraulic chamber from described hydraulic pressure supply department laterally, and
When discharging the hydraulic pressure of described hydraulic chamber, described roller is slided by described resilient member to the inside with cam low described in Structure deformation.
13. variable air valve lift apparatus according to claim 12, it comprises further:
Attachment hole, its described one end being formed in described bar body is to receive the hydraulic pressure from described hydraulic pressure supply department;
The oil duct of bar body, it is formed in described bar body to be communicated with described attachment hole and to extend towards described running shaft;
The oil duct of axle, it is formed in described running shaft to be communicated with the oil duct of described bar body; And
For pressure passageway, it is formed in described axle body and sentences with the oil way cross of described axle and be communicated with described hydraulic chamber.
14. variable air valve lift apparatus according to claim 13, wherein, the hydraulic pressure generated from described hydraulic pressure supply department passes through described attachment hole, the oil duct of described bar body, the oil duct of described axle and described confession pressure passageway successively, thus is supplied to described hydraulic chamber.
15. variable air valve lift apparatus according to claim 13, wherein form the hydraulic pressure supply orifice be communicated with described attachment hole at place of described hydraulic pressure supply department thus the described hydraulic pressure generated from described hydraulic pressure supply department is supplied to described bar body, and when the base portion of cam high described in described roller contact or described low cam, described attachment hole is communicated with described hydraulic pressure supply orifice, and when making described roller contact with described high cam or described low cam lobe, being communicated with between described attachment hole with described hydraulic pressure supply orifice is closed.
16. variable air valve lift apparatus according to claim 13, the wherein said pressure passageway that supplies is formed as tilting relative to the length direction of described running shaft.
17. variable air valve lift apparatus according to claim 12, the base of wherein said high cam is consistent with the base of described low cam.
18. variable air valve lift apparatus according to claim 12, wherein stop member is formed as the slip at described roller slip limit to the inside roller, and described stop member protrudes from the periphery of described axle body.
19. variable air valve lift apparatus according to claim 12, wherein said roller has two rollers, and described two rollers slide laterally simultaneously or slide to the inside.
20. variable air valve lift apparatus according to claim 19, wherein said high cam has two high cams of the both sides being arranged on described low cam, thus described two rollers are slided laterally with two high cams described in difference Structure deformation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140119222A KR101566756B1 (en) | 2014-09-05 | 2014-09-05 | Variable valve lift appratus |
| KR10-2014-0119222 | 2014-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443187A true CN105443187A (en) | 2016-03-30 |
Family
ID=54601290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510118313.1A Pending CN105443187A (en) | 2014-09-05 | 2015-03-18 | Variable valve lift apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9771838B2 (en) |
| JP (1) | JP6502709B2 (en) |
| KR (1) | KR101566756B1 (en) |
| CN (1) | CN105443187A (en) |
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| JPH0544410A (en) * | 1991-08-06 | 1993-02-23 | Fuji Oozx Kk | Rocker arm for variable valve timing lift mechanism |
| KR20070093596A (en) * | 2006-03-14 | 2007-09-19 | 현대자동차주식회사 | Variable valve structure |
| KR20090051491A (en) * | 2007-11-19 | 2009-05-22 | 현대자동차주식회사 | Roller tappet of direct acting type of variable valve lift device for vehicle |
| CN101457678A (en) * | 2008-12-31 | 2009-06-17 | 奇瑞汽车股份有限公司 | Novel lift range valve mechanism for variable valve |
| US20090223473A1 (en) * | 2008-03-05 | 2009-09-10 | Gm Global Technology Operations, Inc. | Rocker arm assembly |
| CN102454445A (en) * | 2010-10-22 | 2012-05-16 | 现代自动车株式会社 | Variable valve lift apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62202819A (en) | 1986-02-26 | 1987-09-07 | Sumitomo Metal Ind Ltd | Recovery of zinc carbonate from zn-containing material |
| JPH0458006A (en) * | 1990-06-27 | 1992-02-25 | Fuji Heavy Ind Ltd | Variable valve timing device |
| JP2002188418A (en) * | 2000-12-21 | 2002-07-05 | Yamaha Motor Co Ltd | Variable load valve of internal combustion engine |
| US6755167B2 (en) * | 2002-02-26 | 2004-06-29 | Delphi Technologies, Inc. | Two-step roller finger cam follower having spool-shaped low-lift roller |
| KR20090043283A (en) | 2007-10-29 | 2009-05-06 | 현대자동차주식회사 | 2 step variable valve driving device of roller swing type for vehicle |
| DE102010019064A1 (en) * | 2010-05-03 | 2011-11-03 | Schaeffler Technologies Gmbh & Co. Kg | Switchable lever for a valve train of an internal combustion engine |
| US20140366826A1 (en) * | 2013-06-18 | 2014-12-18 | GT Technologies | Retention device for valve actuating mechanism |
-
2014
- 2014-09-05 KR KR1020140119222A patent/KR101566756B1/en active IP Right Grant
- 2014-12-02 US US14/558,650 patent/US9771838B2/en active Active
-
2015
- 2015-03-13 JP JP2015050445A patent/JP6502709B2/en not_active Expired - Fee Related
- 2015-03-18 CN CN201510118313.1A patent/CN105443187A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0544410A (en) * | 1991-08-06 | 1993-02-23 | Fuji Oozx Kk | Rocker arm for variable valve timing lift mechanism |
| KR20070093596A (en) * | 2006-03-14 | 2007-09-19 | 현대자동차주식회사 | Variable valve structure |
| KR20090051491A (en) * | 2007-11-19 | 2009-05-22 | 현대자동차주식회사 | Roller tappet of direct acting type of variable valve lift device for vehicle |
| US20090223473A1 (en) * | 2008-03-05 | 2009-09-10 | Gm Global Technology Operations, Inc. | Rocker arm assembly |
| CN101457678A (en) * | 2008-12-31 | 2009-06-17 | 奇瑞汽车股份有限公司 | Novel lift range valve mechanism for variable valve |
| CN102454445A (en) * | 2010-10-22 | 2012-05-16 | 现代自动车株式会社 | Variable valve lift apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6502709B2 (en) | 2019-04-17 |
| KR101566756B1 (en) | 2015-11-06 |
| JP2016056799A (en) | 2016-04-21 |
| US9771838B2 (en) | 2017-09-26 |
| US20160069225A1 (en) | 2016-03-10 |
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Application publication date: 20160330 |